A new model and its performance for TDOA estimation

Abstract

It is well known that the TDOA estimation technique has been widely used in many kinds of location systems, such as radar, sonar and GPS etc. But, because of its serious multipath propagation the cellular location system has much more difficulty in using TDOA than those traditional location-oriented systems mentioned. And so, looking for a new TDOA estimation model and algorithm that is robust and accurate in all kinds of propagation environments is an especially important task for cellular systems. This article combines multipath equalization and identification techniques and proposes a new model and algorithm for TDOA estimation in a cellular positioning system. Theory and computer simulation both prove that a simple estimation algorithm can obtain good estimation results in this model.